Samsung Mini Split Error Codes

C codes

• Samsung C101 error code
  C101 means an indoor/outdoor communication error (shown with its E101 equivalent on some models): the indoor board is not receiving valid data from th…
• Samsung C102 error code
  Samsung C102 is documented two ways: the AR09DXDABWKNCV service manual pairs it with C101 as an indoor/outdoor communication error, while the WindFree…
• Samsung C108 error code
  On WindFree 3.0 / AR+C manuals, C108 is a set-address error - the indoor unit's address setting is wrong or unreadable. On newer Samsung R-32 resident…
• Samsung C121 error code
  C121 means an indoor room temperature (room TH) sensor error on Samsung splits: the room thermistor is open, shorted, or out of range. One source read…
• Samsung C122 error code
  C122 means an evaporator sensor fault - the service manual lists C122/C123 as the indoor mid / indoor-in evaporator (EVA-TH) temperature sensor error,…
• Samsung C123 error code
  C123 on a Samsung mini split is a motion/sensor error. Reset once at the breaker; if C123 returns, sensor or board diagnosis is a technician job.…
• Samsung C140 error code
  C140 on a Samsung mini split is an indoor fan error. Check the intake/filter is clear and reset once; if C140 returns, the fan motor or board needs a …
• Samsung C142 error code
  On WindFree 3.0 / AR+C manuals, C142 is a humidity sensor error. Some Samsung series use the same display for a mixed-operation (heat + cool requested…
• Samsung C143 error code
  C143 is a Samsung option (option-setting) error: the indoor board's stored configuration data is missing or corrupted - usually after a PCB swap or an…
• Samsung C154 error code
  C154 means an indoor fan motor fault or protection event. Samsung confirms two patterns: an intermittent C154 occurs when input voltage exceeds the no…
• Samsung C161 error code
  C161 on a Samsung mini split is a drain pump error. Turn the unit off if you see water and check the external drain line; pump or float work is a tech…
• Samsung C203 error code
  C203 on Samsung WindFree Premium R-32 models means an outdoor fan error - the outdoor fan is stalled, blocked, or its motor/driver has failed. Many we…
• Samsung C221 error code
  C221 on Samsung splits means an outdoor temperature (OUT-TH) sensor error - the outdoor ambient thermistor is open, shorted, or out of range. One tabl…
• Samsung C231 error code
  C231 is a communication time-out between the outdoor inverter Micom and the main Micom - the compressor-drive chip and the main control chip stopped t…
• Samsung C251 error code
  C251 is a current sensor error on Samsung C-series systems - the outdoor control cannot get a believable compressor current reading. One breaker reset…
• Samsung C416 error code
  C416 is a discharge temperature (DIS-TH) sensor error - the compressor discharge thermistor is open, shorted, or reading outside its allowed window. C…
• Samsung C422 error code
  C422 (E422) is an EEV / valve error - on Samsung's own service guide it means EEV 1 in the outdoor unit cannot fully open. Clean filters and one break…
• Samsung C440 error code
  C440 is a prohibit-operation-condition error - outdoor conditions are outside the range Samsung allows for the mode. Sources disagree on which mode (C…
• Samsung C441 error code
  C441 is a DC-link voltage sensor error per the SplitAtlas WindFree Premium table - the inverter's DC bus voltage reading is not believable. One breake…
• Samsung C458 error code
  C458 on a Samsung mini split is an EEPROM data error between the main and inverter Micom. Reset once; if C458 returns, the board needs a technician.…
• Samsung C461 error code
  C461 means an EEPROM data error (no data) on the outdoor unit - the outdoor board cannot read its stored option/setting data, so the system will not r…
• Samsung C462 error code
  Samsung C462 maps to AC Input I_limit trip error in official Samsung service documentation (older Avant RAC series); SplitAtlas reads it as GAS LEAK o…
• Samsung C463 error code
  Samsung C463 means IPM over-current error - the inverter's intelligent power module detected excessive current and stopped the compressor. One safe re…
• Samsung C464 error code
  Samsung C464 maps to IPM over-current error in official Samsung service documentation (Avant/WindFree 3.0 series); SplitAtlas reads it as a compressor…
• Samsung C465 error code
  Samsung C465 maps to Compressor V_limit/I_limit error in official Samsung service documentation; SplitAtlas reads it as heatsink over-temperature. Gen…
• Samsung C466 error code
  Samsung C466 maps to DC-Link voltage under/over error in official Samsung service documentation; SplitAtlas reads it as PFC over-load. Generation-depe…
• Samsung C467 error code
  Samsung C467 maps to Compressor wire missing/rotation error in official Samsung service documentation; SplitAtlas reads it as prohibit-operation (heat…
• Samsung C468 error code
  Samsung C468 maps to Current sensor error in official Samsung service documentation; SplitAtlas reads it as heatsink sensor error. Generation-dependen…
• Samsung C469 error code
  Samsung C469 maps to DC-Link voltage sensor error in official Samsung service documentation; SplitAtlas reads it as AC input voltage sensor error. Gen…
• Samsung C470 error code
  Samsung C470 maps to EEPROM data error (no data) in official Samsung service documentation; SplitAtlas reads it as DC-Link voltage under/over error. G…
• Samsung C471 error code
  Samsung C471 maps to EEPROM data error (main micom <-> inverter micom) in official Samsung service documentation; SplitAtlas reads it as compressor wi…
• Samsung C474 error code
  Samsung C474 maps to Heat sink sensor error in official Samsung service documentation; SplitAtlas reads it as input current sensor error. Generation-d…
• Samsung C483 error code
  Samsung C483 maps to Over-voltage protection error in official Samsung service documentation; SplitAtlas reads it as an outdoor temperature sensor err…
• Samsung C484 error code
  Samsung C484 maps to PFC over load error in official Samsung service documentation; SplitAtlas reads it as over-voltage protection error. Generation-d…
• Samsung C485 error code
  Samsung C485 maps to Input current sensor error in official Samsung service documentation; SplitAtlas reads it as Compressor V_limit/I_limit error. Ge…
• Samsung C488 error code
  Samsung C488 maps to AC Input voltage sensor error in official Samsung service documentation; SplitAtlas reads it as AC input I_limit trip error. Gene…
• Samsung C500 error code
  Samsung C500 maps to Heat sink over temperature error in official Samsung service documentation; SplitAtlas reads it as a condenser temperature sensor…
• Samsung C554 error code
  Samsung C554 is a refrigerant protection code: official Samsung documents label it Gas leak error and Samsung Korea support says it means refrigerant …
• Samsung C574 error code
  Samsung C574 is a refrigerant shortage code: official Samsung documents label it Gas shortage error and Samsung Korea support says it means refrigeran…